JP4937978B2

JP4937978B2 - Circuit board unit

Info

Publication number: JP4937978B2
Application number: JP2008228918A
Authority: JP
Inventors: 善光高辻; 望悦見
Original assignee: Calsonic Kansei Corp
Current assignee: Calsonic Kansei Corp
Priority date: 2008-09-05
Filing date: 2008-09-05
Publication date: 2012-05-23
Anticipated expiration: 2028-09-05
Also published as: JP2010062470A

Description

本発明は、主に車両に搭載され、長尺な基板を内蔵する回路基板ユニットの技術分野に属する。 The present invention belongs to the technical field of a circuit board unit which is mainly mounted on a vehicle and incorporates a long board.

従来では、アッパーケースとロアケースを接合した内部に回路基板を配設し、電線に比べて低い電流を導体パターンにより流している（例えば、特許文献１参照。）。
特開２００６−４４５８７号公報（第２−６頁、全図） Conventionally, a circuit board is disposed inside an upper case and a lower case joined together, and a current lower than that of an electric wire is caused to flow through a conductor pattern (see, for example, Patent Document 1).
JP 2006-44587 A (page 2-6, full view)

しかしながら、従来にあっては、導体パターンやアッパーケース、ロアケースによる構造の低級音の防止が充分ではなかった。
この点について、詳しく説明する。
例えば車両では、駆動源としてのエンジンやモータの振動、走行路面による振動により、搭載される機器は振動環境下におかれることになる。
この振動環境下において、当接や擦れを生じると、ドライバが不快に感じたり、違和感として捉える低級音が発生する。 However, in the prior art, it has not been sufficient to prevent the low-level sound of the structure by the conductor pattern, the upper case, and the lower case.
This point will be described in detail.
For example, in a vehicle, a device to be mounted is placed in a vibration environment due to vibrations of an engine and a motor as a driving source and vibrations of a traveling road surface.
When contact or rubbing occurs in this vibration environment, a low-pitched sound that the driver feels uncomfortable or feels uncomfortable is generated.

本発明は、上記問題点に着目してなされたもので、その目的とするところは、低級音の発生を抑制する回路基板ユニットを提供することにある。 The present invention has been made paying attention to the above-mentioned problems, and an object of the present invention is to provide a circuit board unit that suppresses the generation of lower sounds.

上記目的を達成するため、本発明では、長尺な回路基板をアッパーケースとロアケースによって形成される空間内に収容する回路基板ユニットにおいて、前記アッパーケースと前記ロアケースを結合するとともに、前記アッパーケースと前記ロアケースで前記回路基板を所定位置範囲に挟み込むように保持させる第１結合手段と、前記第１結合手段による結合状態から行われ、前記回路基板を前記アッパーケース又は前記ロアケースに固定し、且つ前記アッパーケースと前記ロアケースを結合する前記第１結合手段より強固に結合する第２結合手段と、を備え、前記第２結合手段は、結合の際に前記第１結合手段の結合を解除する、ことを特徴とする。 In order to achieve the above object, in the present invention, in a circuit board unit that accommodates a long circuit board in a space formed by an upper case and a lower case, the upper case and the lower case are coupled to each other. A first coupling means for holding the circuit board so as to be sandwiched in a predetermined position range by the lower case, and a coupling state by the first coupling means, fixing the circuit board to the upper case or the lower case, and An upper case and a second coupling means for coupling the upper case more firmly than the first coupling means for coupling the lower case, and the second coupling means releases the coupling of the first coupling means when coupled. It is characterized by.

よって、本発明にあっては、低級音の発生を抑制することができる。 Therefore, in the present invention, it is possible to suppress the generation of lower sounds.

以下、本発明の回路基板ユニットを実現する実施の形態を、請求項１〜５に係る発明に対応する実施例１に基づいて説明する。 Hereinafter, an embodiment for realizing a circuit board unit of the present invention will be described based on Example 1 corresponding to the invention according to claims 1 to 5.

まず、構成を説明する。
図１は実施例１の回路基板ユニットの車両組付け状態を示す説明斜視図である。図２は実施例１の回路基板ユニットの車両組付け状態を示す説明図である。
実施例１の回路基板ユニット１は、インストパネルの内部に設けられるクロスカービーム５０に取り付けられ、コックピットモジュールを構成する。コックピットモジュールは、予め組み立てられ、車両の車体に対して一度に搭載される。
そして、回路基板ユニット１は、車両の左右方向への電源配線、信号配線の一部を受け持つ。また、一部電子部品の実装を行ってもよい。 First, the configuration will be described.
FIG. 1 is an explanatory perspective view showing a vehicle assembly state of the circuit board unit according to the first embodiment. FIG. 2 is an explanatory diagram illustrating a vehicle assembly state of the circuit board unit according to the first embodiment.
The circuit board unit 1 according to the first embodiment is attached to a cross car beam 50 provided inside the instrument panel, and constitutes a cockpit module. The cockpit module is assembled in advance and mounted on the vehicle body at once.
The circuit board unit 1 is responsible for part of the power supply wiring and signal wiring in the left-right direction of the vehicle. Also, some electronic components may be mounted.

図３は実施例１の回路基板ユニットの斜視図である。図４は実施例１の回路基板ユニットの分解状態を示す斜視図である。
回路基板ユニット１は、樹脂製のアッパーケース２及びロアケース３の上下２体を組付けた構造であり、その内部に回路基板４を収容する構造である。
まず、アッパーケース２の構造について説明する。
アッパーケース２は、その長尺な側部に、締結によるロアケース３との取り付けのためのネジ受け部２１を設ける。
また、アッパーケース２の周縁部の複数箇所には、ロアケース３との仮止めのための係合爪部２２を設ける。 FIG. 3 is a perspective view of the circuit board unit according to the first embodiment. FIG. 4 is a perspective view illustrating an exploded state of the circuit board unit according to the first embodiment.
The circuit board unit 1 has a structure in which two upper and lower bodies of a resin upper case 2 and a lower case 3 are assembled, and a circuit board 4 is accommodated therein.
First, the structure of the upper case 2 will be described.
The upper case 2 is provided with a screw receiving portion 21 for attachment to the lower case 3 by fastening on the long side portion thereof.
In addition, engaging claw portions 22 for temporary fixing to the lower case 3 are provided at a plurality of locations on the peripheral edge of the upper case 2.

さらに、アッパーケース２の上面において、前後方向の中央で左右の長手方向の複数箇所に、ハーネスやダクトの、アッパーケース２への取り付けを可能にする取付部２３を設ける。
次に、アッパーケース２の手前側の３箇所には、下方へ伸びた舌片形状で、奥側の２箇所には、奥側へ伸びた舌片形状で、取り付け用の穴を備えた取付部２４を設ける。この取付部２４は、回路基板ユニット１のクロスカービーム５０への取り付けに用いられる。
また、アッパーケース２の左右端部には、左右へそれぞれ伸びた舌片形状で、取り付け用の穴を備えた取付部２５を設ける。この取付部２５は、回路基板ユニット１のクロスカービーム５０への取り付けに用いられる。 Furthermore, on the upper surface of the upper case 2, attachment portions 23 that allow attachment of harnesses and ducts to the upper case 2 are provided at a plurality of locations in the left and right longitudinal directions at the center in the front-rear direction.
Next, the upper case 2 has a tongue piece shape extending downward at three locations on the front side, and a tongue piece shape extending toward the rear side at two locations on the back side, and provided with mounting holes. A portion 24 is provided. The mounting portion 24 is used for mounting the circuit board unit 1 to the cross car beam 50.
In addition, the left and right end portions of the upper case 2 are provided with attachment portions 25 each having a tongue shape extending to the left and right and provided with attachment holes. The mounting portion 25 is used for mounting the circuit board unit 1 to the cross car beam 50.

次にロアケース３の構造について説明する。
ロアケース３は、その長尺な側部に、アッパーケースのネジ受け部２１と重ねるように当接させ、ネジ５で締結する部分としたネジ止め部３１を設ける。
また、ロアケース３の周縁部の複数箇所で、アッパーケース２の係合爪部２２に対応する箇所には、アッパーケース２の係合爪部２２を撓みで乗り越えるようにして、引っ掛けるように係合するコ字状（枠形状）の係合部３２を設ける。 Next, the structure of the lower case 3 will be described.
The lower case 3 is provided with a screwing portion 31 on the long side thereof so as to be in contact with the screw receiving portion 21 of the upper case so as to be fastened with the screw 5.
Further, at a plurality of positions on the peripheral edge portion of the lower case 3, the portions corresponding to the engaging claw portions 22 of the upper case 2 are engaged so as to be hooked by being bent over the engaging claw portions 22 of the upper case 2. A U-shaped (frame shape) engaging portion 32 is provided.

図５は実施例１の回路基板ユニットの一部のネジを省略した下面側斜視図である。
ロアケース３の底面の左右いずれか一方の辺縁側には、収容した回路基板４とコックピットモジュールの機器との電気接続を行うコネクタ４ｄが露出する部分が設けられている。コネクタ４ｄは、回路基板４に予め取り付けられ、外部と電気的に接続されている。なお、図４には、回路基板４ａ、４ｂにおけるコネクタの実装位置を符号４ｄで示す。
そして、ロアケース３には、コネクタ４ｄの周囲を側壁により囲むコネクタ保護部３３を設ける。
次に回路基板４について説明する。
回路基板４は、ロアケース３に収容され、左右に分かれた回路基板４ａと回路基板４ｂが中央で、フラットケーブル４ｃにより接続される構造である。 FIG. 5 is a bottom perspective view in which some screws of the circuit board unit according to the first embodiment are omitted.
On either the left or right edge side of the bottom surface of the lower case 3, there is provided a portion where a connector 4 d that performs electrical connection between the accommodated circuit board 4 and the cockpit module device is exposed. The connector 4d is attached to the circuit board 4 in advance and is electrically connected to the outside. In FIG. 4, the mounting position of the connector on the circuit boards 4a and 4b is indicated by reference numeral 4d.
The lower case 3 is provided with a connector protection portion 33 that surrounds the periphery of the connector 4d with side walls.
Next, the circuit board 4 will be described.
The circuit board 4 is housed in the lower case 3 and has a structure in which a circuit board 4a and a circuit board 4b which are divided into left and right are connected by a flat cable 4c at the center.

次に回路基板４の保持構造について説明する。
図６は実施例１の回路基板ユニットの断面図である。図７は実施例１の回路基板ユニットの断面斜視図である。図８は実施例１の回路基板ユニットのロアケースの平面図である。図９及び図１０は実施例１の回路基板ユニットのロアケースの一部拡大斜視図である。図１１は実施例１の回路基板ユニットの三角リブ部の説明斜視図である。
回路基板４の保持構造としては、回路基板４の短尺方向の両端部分に対応するロアケース３の位置に、ロアケース３の中央側よりも若干高い保持部３４を複数箇所に設ける。
この保持部３４は、図８〜図１１に示すように、複数設けるうちの一部がネジ止め部３１に対応する位置、つまりネジ止め部３１の内側位置に配置する。
さらにそのうちの一部は、コネクタ４ｄに対応する位置に配置される。
また、ロアケース３の中央側には、回路基板４の下面を保持部３４よりも若干低い支持部３５を複数箇所に設ける。
そして、支持部３５の一部は、ネジ５がネジ部を貫通するように、頭部が着座する構造にする（これを支持部３５ｂとする。詳細は後述する）。
これにより、回路基板４をロアケース３に載せると、回路基板４は図６に示すように、短尺な幅方向の両端を保持部３４で支持され、中央を支持部３５で支持されることになる。 Next, the holding structure of the circuit board 4 will be described.
FIG. 6 is a cross-sectional view of the circuit board unit according to the first embodiment. FIG. 7 is a cross-sectional perspective view of the circuit board unit according to the first embodiment. FIG. 8 is a plan view of the lower case of the circuit board unit according to the first embodiment. 9 and 10 are partially enlarged perspective views of the lower case of the circuit board unit according to the first embodiment. FIG. 11 is an explanatory perspective view of a triangular rib portion of the circuit board unit according to the first embodiment.
As a holding structure of the circuit board 4, holding parts 34 that are slightly higher than the center side of the lower case 3 are provided at a plurality of positions at positions of the lower case 3 corresponding to both ends of the circuit board 4 in the short direction.
As shown in FIGS. 8 to 11, the holding portion 34 is arranged at a position where a portion of the plurality of holding portions 34 corresponds to the screwing portion 31, that is, an inner position of the screwing portion 31.
Further, some of them are arranged at positions corresponding to the connectors 4d.
In addition, on the center side of the lower case 3, support portions 35 having a lower surface of the circuit board 4 slightly lower than the holding portion 34 are provided at a plurality of locations.
A part of the support part 35 is structured such that the head is seated so that the screw 5 penetrates the screw part (this is a support part 35b, which will be described in detail later).
As a result, when the circuit board 4 is placed on the lower case 3, the circuit board 4 is supported at both ends in the short width direction by the holding portions 34 and supported at the center by the support portions 35, as shown in FIG. 6. .

次に、アッパーケース２は、支持部３５ｂに重なる位置にリブ部２６を設ける。リブ部２６は略円筒形状で、図示しないがネジ用の孔を下端に有し、ネジ５の締結で下面を回路基板４に当接させる構造である。
さらに、回路基板４の短尺方向の両端に対応する位置には、三角リブ部２７を設ける。三角リブ部２７は、リブ部２６及び支持部３５におけるネジの締結により、下端が回路基板４に強く押し付けられる構造である。
このように、回路基板４は、アッパー側のリブ部２６、三角リブ部２７、ロア側の保持部３４、支持部３５により、挟むようにして保持される構造である。 Next, the upper case 2 is provided with a rib portion 26 at a position overlapping the support portion 35b. The rib portion 26 has a substantially cylindrical shape, has a screw hole (not shown) at the lower end, and has a structure in which the lower surface is brought into contact with the circuit board 4 by fastening the screw 5.
Further, triangular rib portions 27 are provided at positions corresponding to both ends of the circuit board 4 in the short direction. The triangular rib portion 27 has a structure in which the lower end is strongly pressed against the circuit board 4 by fastening the screws in the rib portion 26 and the support portion 35.
In this manner, the circuit board 4 is structured to be held between the upper rib portion 26, the triangular rib portion 27, the lower holding portion 34, and the support portion 35.

なお、三角リブ部２７は、図１１に示すように矩形部２７ａ、三角部２７ｂ、下端部２７ｃを備え、下端部２７ｃは、下方に行くに従って回路基板ユニット１の短尺方向及び長尺方向が短くなるよう傾斜したテーパ面を四方に有し、回路基板４への当接面積を小さくする形状にする。
そして、三角リブ部２７は、リブ部２６及び支持部３５におけるネジの締結により、必ず下端部２７ｃが回路基板４に当接し、押し付けられる寸法関係にしておく。 The triangular rib portion 27 includes a rectangular portion 27a, a triangular portion 27b, and a lower end portion 27c as shown in FIG. 11, and the lower end portion 27c is shorter in the short direction and the long direction of the circuit board unit 1 as it goes downward. The tapered surfaces are inclined in four directions so that the contact area with the circuit board 4 is reduced.
The triangular rib portion 27 is in a dimensional relationship such that the lower end portion 27c abuts against the circuit board 4 and is pressed by fastening the screws in the rib portion 26 and the support portion 35.

次に、回路基板４のさらに詳細な保持構造について説明する。
図１２は実施例１の回路基板ユニットのロアケースと回路基板の取り付け構造を示す説明図である。なお、図１２には、一部に三角リブ部２７を示すと共に、図１２には、回路基板４ｂの取付構造を示すが、回路基板４ａも同じ取付構造である。
ロアケース３の支持部３５は、長尺方向に複数が配列し、この配列の両端に位置する支持部３５は、支持部３５ａとし、支持部３５ａの上面から位置決めピン３６が上方に突出するものとする。
そして、その間に位置する支持部３５を支持部３５ｂとし、ネジ５のネジ部が上方に突出するものとする。 Next, a more detailed holding structure of the circuit board 4 will be described.
FIG. 12 is an explanatory diagram illustrating a mounting structure of the lower case and the circuit board of the circuit board unit according to the first embodiment. 12 shows a part of the triangular rib portion 27, and FIG. 12 shows the mounting structure of the circuit board 4b. The circuit board 4a also has the same mounting structure.
A plurality of support portions 35 of the lower case 3 are arranged in the longitudinal direction, and the support portions 35 positioned at both ends of the arrangement are support portions 35a, and the positioning pins 36 protrude upward from the upper surface of the support portion 35a. To do.
And let the support part 35 located in the meantime be the support part 35b, and the screw part of the screw 5 shall protrude upwards.

回路基板４は、長尺方向の中央側となる１箇所の位置決めピン３６を、貫通させるための位置決め孔４１を設けるようにする。さらに、位置決め孔４１以外の位置決めピン３６及びネジ５のネジ部を貫通させるための長孔４２を設ける。長孔４２は、長尺方向に長い孔形状とする。
なお、図１２には三角リブ部２７を、１箇所のコネクタ４ｄに対応するように示しているが、図１２に示す長尺方向両側のコネクタ４ｄ（並列して２つが設けられているもの）にも対応して配設されるものとする。 The circuit board 4 is provided with a positioning hole 41 for penetrating one positioning pin 36 on the center side in the longitudinal direction. Further, a long hole 42 is provided for allowing the positioning pin 36 other than the positioning hole 41 and the screw portion of the screw 5 to pass therethrough. The long hole 42 has a long hole shape in the long direction.
In FIG. 12, the triangular rib portion 27 is shown so as to correspond to one connector 4d, but the connectors 4d on both sides in the longitudinal direction shown in FIG. 12 (two provided in parallel). It shall be arranged corresponding to.

次にアッパーケース２の係合爪部２２とロアケース３の係合部３２の詳細な係合構造について説明する。
図１３は実施例１の回路基板ユニットのアッパーケースの係合爪部とロアケースの係合部の係合構造の説明図である。
アッパーケース２の係合爪部２２は、上下に長い凸部２８を左右に配置する。そして、係合爪部２２は、図６に示すように、下部は係合部３２が係合爪部２２に乗り上げやすいように傾斜させた傾斜部２２ａを設ける。また、上部は上面が平面で角のある形状にして係合面部２２ｂとし、係合部３２を確実に引っ掛けるようにする。 Next, a detailed engagement structure of the engagement claw portion 22 of the upper case 2 and the engagement portion 32 of the lower case 3 will be described.
FIG. 13 is an explanatory diagram of the engagement structure of the engaging claw portion of the upper case and the engaging portion of the lower case of the circuit board unit according to the first embodiment.
The engaging claw portion 22 of the upper case 2 has convex portions 28 that are long in the vertical direction. As shown in FIG. 6, the engaging claw portion 22 is provided with an inclined portion 22 a that is inclined so that the engaging portion 32 can easily ride on the engaging claw portion 22. Further, the upper surface has a flat top surface and an angular shape to form an engaging surface portion 22b so that the engaging portion 32 can be securely hooked.

ロアケース３の係合部３２は、下端を基端とし上方へ伸びる片持ち形状の片持ち部分３２ａを左右に設け、左右の上端を接続して、コ字状にする。そして、左右の上端を接続する接続部分３２ｂが係合爪部２２に係合する形状である。
そして、係合爪部２２の係合面部２２ｂと係合部３２の接続部分３２ｂが当接する係合状態では、アッパーケース２のリブ部２６と回路基板４、アッパーケース２のネジ受け部２１とロアケース３のネジ止め部３１は、所定の間隙を有する範囲となる位置関係にする。なお、この係合状態で三角リブ部２７は、軽く回路基板４に当接させる位置関係にする。 The engaging portion 32 of the lower case 3 is provided with cantilevered portions 32a having a lower end as a base end and extending upward, and is connected to the upper ends of the left and right sides to form a U shape. And the connection part 32b which connects the upper end of right and left is a shape engaged with the engaging claw part 22. FIG.
In the engaged state where the engagement surface portion 22b of the engagement claw portion 22 and the connection portion 32b of the engagement portion 32 abut, the rib portion 26 of the upper case 2, the circuit board 4, and the screw receiving portion 21 of the upper case 2 The screwing portion 31 of the lower case 3 is in a positional relationship that is a range having a predetermined gap. In this engagement state, the triangular rib portion 27 is in a positional relationship to be lightly abutted against the circuit board 4.

作用を説明する。
[コックピットモジュールの配電、配線を行う作用]
実施例１の回路基板ユニット１は、コックピットモジュールのクロスカービーム５０に取り付けられ、コックピットモジュールにおける左右方向の電力の伝達、信号の送受を行う。そのため、コックピットモジュールのインストパネルの内部は、配線が簡略化され、非常に省スペースな構成となる。
また、回路基板ユニット１の上面には、左右方向に複数の取付部２３が設けられているため、回路基板ユニット１の上面を利用して左右方向へ束状に配線を行い、取付部２３で電線や信号線を固定するようにしてもよい。
また、回路基板ユニット１の底面に設けられた複数のコネクタ４ｄから電源供給や信号線の接続を行うため、コックピットモジュールのインストパネルの内部は、非常に簡素な配線構造となる。 The operation will be described.
[Distribution and wiring of cockpit module]
The circuit board unit 1 according to the first embodiment is attached to the cross car beam 50 of the cockpit module, and transmits and receives power in the left-right direction in the cockpit module. For this reason, the inside of the instrument panel of the cockpit module is simplified in wiring and has a very space-saving configuration.
In addition, since a plurality of mounting portions 23 are provided on the upper surface of the circuit board unit 1 in the left-right direction, wiring is performed in a bundle shape in the left-right direction using the upper surface of the circuit board unit 1. You may make it fix an electric wire and a signal wire | line.
Further, since the power supply and signal lines are connected from the plurality of connectors 4d provided on the bottom surface of the circuit board unit 1, the inside of the instrument panel of the cockpit module has a very simple wiring structure.

[低級音を抑制する作用]
図１４は実施例１の回路基板ユニットの組付け前の状態を示す説明分解図である。図１５はアッパーケースとロアケースの組付け前の状態を示す説明分解図である。
図１４に示すように、回路基板ユニット１を組み付ける際には、まず、ロアケース３に回路基板４(4a,4b)を上方から載置する。その際には、図１２に示すように、回路基板４の位置決め孔４１及び長孔４２をロアケース３の上面の位置決めピン３６が貫通するようにする。
これによりロアケース３の周縁部に囲まれた内部に回路基板４が収容される。
この状態では、回路基板４は、ロアケース３の保持部３４と支持部３５による複数点支持によりロアケース３の底面より上方位置に維持される。保持部３４で回路基板４の周縁を支持し、支持部３５で回路基板４の幅方向中央部を支持する。また、この際、回路基板４に実装され、下方に突出するコネクタ４ｄは、ロアケース３のコネクタ保護部３３で囲まれた部分の貫通孔部分で下方外部へ突出させる。
左右の回路基板４(4a,4b)の電気的接続を行うフラットケーブル４ｃの接続は、この状態で行ってもよいし、ロアケース３へ載置する前に行ってもよい。 [Action to suppress low tone]
FIG. 14 is an explanatory exploded view showing a state before the circuit board unit of Example 1 is assembled. FIG. 15 is an explanatory exploded view showing a state before the upper case and the lower case are assembled.
As shown in FIG. 14, when the circuit board unit 1 is assembled, first, the circuit board 4 (4a, 4b) is placed on the lower case 3 from above. At that time, as shown in FIG. 12, the positioning pins 36 on the upper surface of the lower case 3 pass through the positioning holes 41 and the long holes 42 of the circuit board 4.
As a result, the circuit board 4 is accommodated inside the lower case 3 surrounded by the peripheral edge.
In this state, the circuit board 4 is maintained at a position above the bottom surface of the lower case 3 by a plurality of points supported by the holding portion 34 and the support portion 35 of the lower case 3. The holding part 34 supports the peripheral edge of the circuit board 4, and the support part 35 supports the center part in the width direction of the circuit board 4. At this time, the connector 4 d that is mounted on the circuit board 4 and protrudes downward is protruded downward and outward at a portion of the through hole surrounded by the connector protection portion 33 of the lower case 3.
The connection of the flat cable 4c for electrically connecting the left and right circuit boards 4 (4a, 4b) may be performed in this state, or may be performed before being placed on the lower case 3.

次に、ロアケース３に対して上方からアッパーケース２を載せるようにする。その際には、まずアッパーケース２の係合爪部２２の左右に設けた凸部２８の間にロアケース３の係合部３２を位置させるようにしておおまかな相対位置を決める（図１５参照）。
そして、係合爪部２２と係合部３２の位置を合わせ、さらにアッパーケース２をロアケース３に接近させる。すると、係合部３２の接続部分３２ｂが、係合爪部２２の傾斜部２２ａの傾斜に徐々に乗り上げるようになり、係合部３２の片持ち部分３２ａは、下端を基端に撓むことになる。 Next, the upper case 2 is placed on the lower case 3 from above. At that time, first, an approximate relative position is determined by positioning the engaging portion 32 of the lower case 3 between the convex portions 28 provided on the left and right of the engaging claw portion 22 of the upper case 2 (see FIG. 15). .
Then, the positions of the engaging claws 22 and the engaging portions 32 are aligned, and the upper case 2 is further brought closer to the lower case 3. Then, the connection portion 32b of the engagement portion 32 gradually climbs on the inclination of the inclined portion 22a of the engagement claw portion 22, and the cantilever portion 32a of the engagement portion 32 bends from the lower end to the base end. become.

さらに、アッパーケース２をロアケース３に接近させる方向に移動させると、係合部３２の接続部分３２ｂが、係合爪部２２を乗り越える。すると、係合部３２の片持ち部分３２ａは、その弾性により撓みのない状態に戻る。そのため、係合部３２の接続部分３２ｂは、係合爪部２２の係合面部２２ｂと当接する（図１３参照）。
そのため、アッパーケース２とロアケース３とが所定範囲以上離間しない係合状態となる。 Further, when the upper case 2 is moved in a direction to approach the lower case 3, the connecting portion 32 b of the engaging portion 32 gets over the engaging claw portion 22. Then, the cantilever part 32a of the engaging part 32 returns to a state without bending due to its elasticity. Therefore, the connection part 32b of the engaging part 32 contacts the engaging surface part 22b of the engaging claw part 22 (see FIG. 13).
Therefore, the upper case 2 and the lower case 3 are in an engaged state in which they are not separated by a predetermined range or more.

この係合状態では、係合爪部２２は、左右方向においては係合部３２の片持ち部分３２ａで所定の範囲に維持される。
また、この係合状態では、回路基板４は、下面を保持部３４と支持部３５で支持され、位置決めピン３６により左右方向の位置を所定範囲に制限される。そして、上方は、リブ部２６が所定の間隙位置に位置することにより、所定範囲に保持される。また、三角リブ部２７は軽く当接した状態となり、回路基板４が保持される。このように係合爪部２２と係合部３２による係合状態では、回路基板４は左右、上下に所定範囲位置に保持される。 In this engaged state, the engaging claw portion 22 is maintained in a predetermined range by the cantilever portion 32a of the engaging portion 32 in the left-right direction.
In this engaged state, the lower surface of the circuit board 4 is supported by the holding portion 34 and the support portion 35, and the position in the left-right direction is limited to a predetermined range by the positioning pins 36. The upper portion is held in a predetermined range by positioning the rib portion 26 at a predetermined gap position. Further, the triangular rib portion 27 is in a light contact state, and the circuit board 4 is held. Thus, in the engaged state by the engaging claw portion 22 and the engaging portion 32, the circuit board 4 is held at a predetermined range position in the left and right and up and down directions.

次に、このように第１の接合状態にある回路基板ユニット１をロアケース３の下面が上方になるよう天地反転させる。
回路基板４は上下左右に所定範囲に保持されていることにより、反転中、反転後も、同様に所定範囲に保持される。
反転したならば、上方からネジ５を差し込むようにし、アッパーケース２のネジ受け部２１とロアケース３のネジ止め部３１を締結する。又、同様に、ネジ５が回路基板４の長孔４２を貫通するようにして、アッパーケース２のリブ部２６とロアケース３の支持部３５ｂで回路基板４を挟み込むように締結する。
このネジ５の締結は、係合爪部２２と係合部３２の係合により、締結を行う部分が所定範囲に位置合わせされているので、特段の締結用の位置合わせを行うことなく、ネジ５の締結作業を行えばよい。
このように実施例１の回路基板ユニット１では、締結方向をロアケース３からアッパーケース２への方向のみとすることにより、締結部分から水が内部へ浸入することがないようにしている。 Next, the circuit board unit 1 in the first bonded state as described above is turned upside down so that the lower surface of the lower case 3 faces upward.
Since the circuit board 4 is held in a predetermined range vertically and horizontally, it is similarly held in the predetermined range during and after the inversion.
If reversed, the screw 5 is inserted from above, and the screw receiving portion 21 of the upper case 2 and the screw fixing portion 31 of the lower case 3 are fastened. Similarly, the screw 5 passes through the long hole 42 of the circuit board 4 and is fastened so that the circuit board 4 is sandwiched between the rib portion 26 of the upper case 2 and the support portion 35 b of the lower case 3.
The fastening of the screw 5 is performed by engaging the engaging claw portion 22 and the engaging portion 32 so that the portion to be fastened is aligned within a predetermined range. 5 may be performed.
As described above, in the circuit board unit 1 according to the first embodiment, the fastening direction is only the direction from the lower case 3 to the upper case 2 so that water does not enter the inside from the fastening portion.

図１６は実施例１の回路基板ユニットのアッパーケースの係合爪部とロアケースの係合部の締結状態を示す説明図である。図１７は実施例１の回路基板ユニットの下面側斜視図である。
第１の接合状態として、アッパーケース２とロアケース３を係合した状態では、ネジ受け部２１とネジ止め部３１が所定の間隙を有し、リブ部２６と回路基板４は、回路基板４に対して所定の間隙を有している。従って、三角リブ部２７と回路基板４は軽く当接する状態である。それが、第２の接合状態として、アッパーケース２とロアケース３を締結した状態では、締結により、ネジ受け部２１とネジ止め部３１、回路基板４とリブ部２６は当接し、押し付けられた状態となる。そして、回路基板４と三角リブ部２７は強く押し付けられた状態となる。三角リブ部２７の下端部２７ｃは弾性変形を許容する形状にしているので、強い押し付けが許容される。 FIG. 16 is an explanatory diagram illustrating a fastening state of the engaging claw portion of the upper case and the engaging portion of the lower case of the circuit board unit according to the first embodiment. FIG. 17 is a bottom perspective view of the circuit board unit according to the first embodiment.
In a state where the upper case 2 and the lower case 3 are engaged as the first joining state, the screw receiving portion 21 and the screwing portion 31 have a predetermined gap, and the rib portion 26 and the circuit board 4 are connected to the circuit board 4. On the other hand, it has a predetermined gap. Therefore, the triangular rib portion 27 and the circuit board 4 are in a light contact state. In the state where the upper case 2 and the lower case 3 are fastened as the second joining state, the screw receiving portion 21 and the screwing portion 31 and the circuit board 4 and the rib portion 26 are in contact with each other and pressed by the fastening. It becomes. And the circuit board 4 and the triangular rib part 27 will be in the state pressed strongly. Since the lower end portion 27c of the triangular rib portion 27 has a shape that allows elastic deformation, strong pressing is permitted.

そのため、図１６に示すように、アッパーケース２の係合爪部２２の係合面部２２ｂと、ロアケース３の係合部３２の接続部分３２ｂは、間隙Ｄを有する状態になる。言い換えると係合が解除される。
そのため、振動により、係合爪部２２と係合部３２が当接を繰り返すようにして生じる低級音を発することがない。当接しない充分な間隙を有した状態が維持される。 Therefore, as shown in FIG. 16, the engagement surface portion 22 b of the engagement claw portion 22 of the upper case 2 and the connection portion 32 b of the engagement portion 32 of the lower case 3 have a gap D. In other words, the engagement is released.
For this reason, vibration does not generate a low-pitched sound that occurs as the engagement claw portion 22 and the engagement portion 32 repeat contact. A state having a sufficient gap that does not contact is maintained.

また、回路基板４を保持するリブ部２６や三角リブ部２７は、締結状態で回路基板４に押し付けられた状態になるため、当接を繰り返すようにして生じる低級音を発することがない。押し付けられた状態が維持される。
このように実施例１の回路基板ユニット１では、まず係合により回路基板ユニット１を反転できるようにし、内部への水の浸入の防止と、作業の容易さから、ロアケース３の底面側からのネジ５の一方向組付けを行う。そして、ネジ５による締結で、係合を解除する。これにより、係合部が当接を繰り返し低級音が発生することがないようにする。また、回路基板４を内部で支持するリブ部２６や三角リブ部２７は、間隙なく押し付けられる状態にすることで、当接を繰り返し低級音が発生することがないようにする。
なお、締結後は回路基板ユニット１をさらに反転し、図３に示す状態となる。 Moreover, since the rib part 26 and the triangular rib part 27 which hold | maintain the circuit board 4 will be in the state pressed against the circuit board 4 in the fastening state, they do not emit the low-pitched sound produced by repeating contact. The pressed state is maintained.
As described above, in the circuit board unit 1 according to the first embodiment, the circuit board unit 1 can be reversed by the engagement first, so that water can be prevented from entering the inside and the work can be easily performed. One-way assembly of the screw 5 is performed. Then, the engagement is released by fastening with the screw 5. As a result, the engaging portion repeats contact and prevents lower sounds from being generated. In addition, the rib portion 26 and the triangular rib portion 27 that support the circuit board 4 are pressed against each other without any gaps, so that lower sounds are not generated repeatedly by contact.
In addition, after the fastening, the circuit board unit 1 is further reversed to be in the state shown in FIG.

また、ロアケース３に設けられ、回路基板４の下面を支持する保持部３４は、ロアケース３のネジ止め部３１の内側に一部を設けるようにしている。すると、締結部の近傍となることにより、締結力を充分に得られるようにして、リブ部２６や三角リブ部２７とより強く挟み込むように回路基板４に押し付けられるようになる。そのため、保持部３４と回路基板４の間に間隙が生じ、当接を繰り返すことで低級音が発生することがさらに確実にないようになる。
また、保持部３４は、回路基板４のコネクタ４ｄの近傍にも一部を配置している。これによりリブ部２６、三角リブ部２７との挟み込みによる基板保持力をコネクタ４ｄの近傍で高めるようにして、コネクタ４ｄに車両機器のコネクタを接続する際のコネクタ挿入、嵌合力に充分に耐え、回路基板４の半田部分に高い応力が生じないようにする。 In addition, a holding portion 34 provided on the lower case 3 and supporting the lower surface of the circuit board 4 is partially provided inside the screwing portion 31 of the lower case 3. Then, by being in the vicinity of the fastening portion, the fastening force can be sufficiently obtained and the circuit board 4 is pressed against the rib portion 26 and the triangular rib portion 27 more strongly. For this reason, a gap is generated between the holding portion 34 and the circuit board 4, and it becomes even more reliable that low-pitched sounds are not generated by repeated contact.
A part of the holding part 34 is also arranged in the vicinity of the connector 4 d of the circuit board 4. As a result, the substrate holding force due to the sandwiching between the rib portion 26 and the triangular rib portion 27 is increased in the vicinity of the connector 4d, and the connector insertion and fitting force when connecting the connector of the vehicle device to the connector 4d are sufficiently endurable. A high stress is not generated in the solder portion of the circuit board 4.

次に、効果を説明する。
実施例１の回路基板ユニットにあっては、下記に列挙する効果を得ることができる。
(1)長尺な回路基板４をアッパーケース２とロアケース３によって形成される空間内に収容する回路基板ユニット１において、アッパーケース２とロアケース３を結合するとともに、アッパーケース２とロアケース３で回路基板４を所定位置範囲に挟み込むように保持させる係合爪部２２と係合部３２による係合での結合と、係合爪部２２と係合部３２による結合状態から行われ、回路基板４をアッパーケース２及びロアケース３に固定し、且つアッパーケース２とロアケース３を結合する係合爪部２２と係合部３２による係合での結合より強固に結合するネジ５による締結での結合を備え、ネジ５による締結での結合は、結合の際に第１結合手段の結合を解除するため、振動により係合部分が当接を繰り返して音を生じることがないようにし、低級音の発生を抑制することができる。 Next, the effect will be described.
In the circuit board unit of the first embodiment, the effects listed below can be obtained.
(1) In the circuit board unit 1 that accommodates the long circuit board 4 in the space formed by the upper case 2 and the lower case 3, the upper case 2 and the lower case 3 are coupled, and the upper case 2 and the lower case 3 The circuit board 4 is formed by coupling by engagement by the engagement claw portion 22 and the engagement portion 32 that hold the substrate 4 so as to be sandwiched in a predetermined position range, and by a coupling state by the engagement claw portion 22 and the engagement portion 32. Is fixed to the upper case 2 and the lower case 3 and is coupled by fastening with the screw 5 that is coupled more firmly than the coupling by the engagement claw portion 22 and the engagement portion 32 that couple the upper case 2 and the lower case 3. In order to release the coupling of the first coupling means at the time of coupling, the engagement portion does not repeatedly abut due to vibration so that no sound is generated. It is possible to suppress the occurrence of lower sound.

(2)上記(1)において、第１の結合は、アッパーケース２の係合爪部２２とロアケース３の係合部３２の係合であり、第２の結合は、アッパーケース２とロアケース３の締結であり、アッパーケース２とロアケース３の締結によりアッパーケース２とロアケース３が密着し、係合爪部２２と係合部３２の係合が解除されるため、係合の解除により、振動で係合部分が当接を繰り返すことがあるような位置関係から開放され、振動により係合部分が当接を繰り返して音を生じることがないようにし、低級音の発生を抑制することができる。 (2) In the above (1), the first coupling is the engagement of the engaging claw portion 22 of the upper case 2 and the engaging portion 32 of the lower case 3, and the second coupling is the upper case 2 and the lower case 3. When the upper case 2 and the lower case 3 are fastened, the upper case 2 and the lower case 3 are brought into close contact with each other, and the engagement between the engagement claw portion 22 and the engagement portion 32 is released. Therefore, the engagement portion is released from the positional relationship in which contact may be repeated, so that the engagement portion does not repeat contact due to vibration and no sound is generated. .

(3)上記(1)又は(2)において、第１の結合の係合部は、係合爪部２２と、段差により係合爪部２２を受ける係合部３２の接続部分３２ｂが係合するものであり、第２の結合は、アッパーケース２とロアケース３の締結であり、アッパーケース２とロアケース３の締結によりアッパーケース２とロアケース３が密着し、係合爪部２２の係合面部２２ｂと係合部３２の接続部分３２ｂが離間することで係合爪部２２と係合部３２の係合が解除されるため、第１の結合では、係合爪部２２に係合部３２を引っ掛けるようにして、アッパーケース２とロアケース３が離れないようにし、第２の結合で締結を行うことにより、第１の結合状態よりアッパーケース２とロアケース３が密着して、係合爪部２２と係合爪部３２の引っ掛かり部分が離間し係合が解除され、振動により係合部分が当接を繰り返して音を生じることがないようにし、低級音の発生を抑制することができる。 (3) In the above (1) or (2), the engaging portion of the first coupling is engaged with the engaging claw portion 22 and the connecting portion 32b of the engaging portion 32 that receives the engaging claw portion 22 by a step. The second coupling is the fastening of the upper case 2 and the lower case 3, and the upper case 2 and the lower case 3 are brought into close contact with each other by the fastening of the upper case 2 and the lower case 3. Since the engagement between the engagement claw 22 and the engagement portion 32 is released by separating the connection portion 32b between the engagement portion 32b and the engagement portion 32, the engagement claw portion 22 and the engagement portion 32 are engaged in the first coupling. So that the upper case 2 and the lower case 3 are not separated from each other and are fastened by the second coupling, whereby the upper case 2 and the lower case 3 are brought into close contact with each other from the first coupling state, and the engaging claw portion 22 and the engaging portion of the engaging claw 32 are separated and the engagement is released. Is, it is possible engagement portion by vibration as do not occur sounds repeat abutment, to suppress the generation of lower sound.

(4)上記(2)又は(3)において、第１の結合は、第２の結合の締結のためのアッパーケース２とロアケース３の位置合わせを兼ねるため、第１の結合の後、第２の結合を行う際に特段の位置合わせ作業を必要としないため、よりすくない作業で回路基板ユニット１の組付けを行うことができる。このことは、作業効率やコストへ寄与する。 (4) In the above (2) or (3), the first coupling also serves as the alignment of the upper case 2 and the lower case 3 for fastening the second coupling. Since no special alignment work is required when these connections are made, the circuit board unit 1 can be assembled with less work. This contributes to work efficiency and cost.

(5)上記(2)〜(4)において、ロアケース３の下面より高い位置に設けられ、回路基板４の周縁の下面を支持する保持部３４と、ロアケース３の保持部３４と同じ高さに設けられ、回路基板４の中央の締結用の長孔４２の下面を支持する支持部３５ｂと、アッパーケース２の下面から下方に突出して設けられ、回路基板４の保持部３４と重ならない上面位置に当接又は近接する三角リブ部２７と、アッパーケース２の下面から下方に突出して設けられ、回路基板４の支持部３５ｂと重なる上面位置に当接又は近接するリブ部２６を備え、第１の結合は、アッパーケース２の係合爪部２２とロアケース３の係合部３２の係合であり、第１の結合状態では、三角リブ部２７が回路基板４に当接し、三角リブ部２７と、保持部３４及び支持部３５ｂで回路基板４を挟み込むように保持し、第２の結合は、アッパーケース２とロアケース３の締結で、少なくとも支持部３５ｂとリブ部２６を締結するものであり、第２の結合状態では、支持部３５ｂとリブ部２６が回路基板４を締結により挟み込むように保持し、三角リブ部２７は第１の結合状態よりも回路基板４に強く押し付けられた状態となるため、回路基板ユニット１の内部で、係合状態において全体を反転して締結を行えるよう回路基板４を保持する構造部分が、締結状態になった際に振動で当接を繰り返し、音を発生する位置関係でないよう充分に押し付けるようにして、振動により係合部分が当接を繰り返して音を生じることがないようにし、低級音の発生を抑制することができる。 (5) In the above (2) to (4), the holding part 34 provided at a position higher than the lower surface of the lower case 3 and supporting the lower surface of the peripheral edge of the circuit board 4 and the same height as the holding part 34 of the lower case 3 A support portion 35b that is provided and supports the lower surface of the fastening long hole 42 at the center of the circuit board 4; and an upper surface position that protrudes downward from the lower surface of the upper case 2 and does not overlap the holding portion 34 of the circuit board 4 A triangular rib portion 27 that is in contact with or close to the upper surface of the upper case 2 and a rib portion 26 that protrudes downward from the lower surface of the upper case 2 and is in contact with or close to the upper surface position that overlaps the support portion 35b of the circuit board 4. Is the engagement of the engaging claw portion 22 of the upper case 2 and the engaging portion 32 of the lower case 3. In the first connected state, the triangular rib portion 27 abuts on the circuit board 4 and the triangular rib portion 27. And a circuit in the holding part 34 and the support part 35b. The plate 4 is held so as to be sandwiched, and the second connection is performed by fastening the upper case 2 and the lower case 3, and at least the support part 35 b and the rib part 26 are fastened. In the second connection state, the support part 35 b And the rib portion 26 hold the circuit board 4 by fastening, and the triangular rib portion 27 is pressed more strongly against the circuit board 4 than in the first coupled state. The structural part that holds the circuit board 4 so as to be able to be fastened by reversing the whole in the engaged state repeatedly contacts with vibration when in the fastened state, and is sufficiently pressed so as not to be in a positional relationship that generates sound. Thus, it is possible to prevent the engagement portion from repeatedly contacting with the vibration and generating a sound, and to suppress the generation of a lower sound.

以上、本発明の回路基板ユニットを実施例１に基づき説明してきたが、具体的な構成については、これらの実施例に限られるものではなく、特許請求の範囲の各請求項に係る発明の要旨を逸脱しない限り、設計の変更や追加等は許容される。 The circuit board unit of the present invention has been described based on the first embodiment. However, the specific configuration is not limited to these embodiments, and the gist of the invention according to each claim of the claims. As long as they do not deviate, design changes and additions are permitted.

実施例１では、左右の２体からなる回路基板４を例として説明したが、さらに複数からなるものであっても、１体物であってもよい。
実施例１の回路基板４は、電源供給、信号伝達のために、ほとんど電子部品の実装のないものとしても、電子部品を充分に実装したものであっても、どちらであってもよい。
実施例１では、コ字形状の係合部３２を示したが、例えば、片持ちの舌片をロアケース３に設け、その内側に爪部を設けたものをアッパーケース２の爪形状や穴形状、段差へ係合させるもののように、他の形状であってもよい。 In Example 1, although the circuit board 4 which consists of two bodies on either side was demonstrated as an example, it may consist of more than one or may be one body thing.
The circuit board 4 according to the first embodiment may be either a circuit board 4 that has almost no electronic components mounted thereon or a circuit board that is sufficiently mounted with electronic components for power supply and signal transmission.
In the first embodiment, the U-shaped engagement portion 32 is shown. For example, a cantilever tongue piece is provided in the lower case 3 and a claw portion is provided on the inside thereof, and the claw shape or hole shape of the upper case 2 is used. Other shapes, such as those that engage the step, may be used.

実施例１の回路基板ユニットの車両組付け状態を示す説明斜視図である。FIG. 3 is an explanatory perspective view illustrating a vehicle assembly state of the circuit board unit according to the first embodiment. 実施例１の回路基板ユニットの車両組付け状態を示す説明図である。It is explanatory drawing which shows the vehicle assembly state of the circuit board unit of Example 1. FIG. 実施例１の回路基板ユニットの斜視図である。1 is a perspective view of a circuit board unit according to Embodiment 1. FIG. 実施例１の回路基板ユニットの分解状態を示す斜視図である。It is a perspective view which shows the decomposition | disassembly state of the circuit board unit of Example 1. FIG. 実施例１の回路基板ユニットの一部のネジを省略した下面側斜視図である。It is the lower surface side perspective view which abbreviate | omitted some screws of the circuit board unit of Example 1. FIG. 実施例１の回路基板ユニットの断面図である。2 is a cross-sectional view of a circuit board unit according to Embodiment 1. FIG. 実施例１の回路基板ユニットの断面斜視図である。1 is a cross-sectional perspective view of a circuit board unit according to Embodiment 1. FIG. 実施例１の回路基板ユニットのロアケースの平面図である。FIG. 3 is a plan view of a lower case of the circuit board unit according to the first embodiment. 実施例１の回路基板ユニットのロアケースの一部拡大斜視図である。FIG. 3 is a partially enlarged perspective view of a lower case of the circuit board unit according to the first embodiment. 実施例１の回路基板ユニットのロアケースの一部拡大斜視図である。FIG. 3 is a partially enlarged perspective view of a lower case of the circuit board unit according to the first embodiment. 実施例１の回路基板ユニットの三角リブ部の説明斜視図である。FIG. 3 is an explanatory perspective view of a triangular rib portion of the circuit board unit according to the first embodiment. 実施例１の回路基板ユニットのロアケースと回路基板の取り付け構造を示す説明図である。It is explanatory drawing which shows the lower case of the circuit board unit of Example 1, and the attachment structure of a circuit board. 実施例１の回路基板ユニットのアッパーケースの係合爪部とロアケースの係合部の係合構造の説明図である。It is explanatory drawing of the engagement structure of the engaging claw part of the upper case of the circuit board unit of Example 1, and the engaging part of a lower case. 実施例１の回路基板ユニットの組付け前の状態を示す説明分解図である。FIG. 3 is an explanatory exploded view showing a state before the circuit board unit of Example 1 is assembled. アッパーケースとロアケースの組付け前の状態を示す説明分解図である。It is explanatory drawing which shows the state before the assembly | attachment of an upper case and a lower case. 実施例１の回路基板ユニットのアッパーケースの係合爪部とロアケースの係合部の締結状態を示す説明図である。It is explanatory drawing which shows the fastening state of the engaging claw part of the upper case of the circuit board unit of Example 1, and the engaging part of a lower case. 実施例１の回路基板ユニットの下面側斜視図である。FIG. 3 is a bottom perspective view of the circuit board unit according to the first embodiment.

Explanation of symbols

１回路基板ユニット
２アッパーケース
２１ネジ受け部
２２係合爪部
２２ａ傾斜部
２２ｂ係合面部
２３取付部
２４取付部
２５取付部
２６リブ部
２７三角リブ部
２７ａ矩形部
２７ｂ三角部
２７ｃ下端部
２８凸部
３ロアケース
３１ネジ止め部
３２係合部
３２ａ片持ち部分
３２ｂ接続部分
３３コネクタ保護部
３４保持部
３５支持部
３５ａ支持部
３５ｂ支持部
３６位置決めピン
４回路基板
４ａ回路基板
４ｂ回路基板
４ｃフラットケーブル
４ｄコネクタ
４１位置決め孔
４２長孔
５ネジ
５０クロスカービーム
１０１リブ部 DESCRIPTION OF SYMBOLS 1 Circuit board unit 2 Upper case 21 Screw receiving part 22 Engagement claw part 22a Inclination part 22b Engagement surface part 23 Attachment part 24 Attachment part 25 Attachment part 26 Rib part 27 Triangle rib part 27a Rectangular part 27b Triangle part 27c Lower end part 28 Convex Part 3 lower case 31 screwing part 32 engaging part 32a cantilever part 32b connection part 33 connector protection part 34 holding part 35 support part 35a support part 35b support part 36 positioning pin 4 circuit board 4a circuit board 4b circuit board 4c flat cable 4d Connector 41 Positioning hole 42 Long hole 5 Screw 50 Cross car beam 101 Rib part

Claims

In a circuit board unit that accommodates a long circuit board in a space formed by an upper case and a lower case,
First coupling means for coupling the upper case and the lower case and holding the circuit board so as to be sandwiched in a predetermined position range by the upper case and the lower case;
Second coupling means, which is performed in a coupled state by the first coupling means, and which fixes the circuit board to the upper case or the lower case and is coupled more firmly than the first coupling means for coupling the upper case and the lower case. When,
With
The second coupling means releases the coupling of the first coupling means during the coupling;
A circuit board unit characterized by that.

The circuit board unit according to claim 1,
The first coupling means is an engagement of the engaging part of the upper case and the engaging part of the lower case,
The second coupling means is fastening of the upper case and the lower case,
The upper case and the lower case are brought into close contact with each other by fastening the upper case and the lower case, and the engagement of the engaging portion is released.
A circuit board unit characterized by that.

In the circuit board unit according to claim 1 or 2,
The engaging part of the first coupling means is an engaging part of a claw part and a claw receiving part that receives the claw part by a step.
The second coupling means is fastening of the upper case and the lower case,
The upper case and the lower case are brought into close contact with each other by fastening the upper case and the lower case, and the engagement of the engagement portion is released by separating the claw portion and the claw receiving portion.
A circuit board unit characterized by that.

In the circuit board unit according to claim 2 or 3,
The first coupling means also serves as an alignment of the upper case and the lower case for fastening the second coupling means,
A circuit board unit characterized by that.

In the circuit board unit according to any one of claims 2 to 4,
A first holding portion provided at a position higher than the lower surface of the lower case and supporting the lower surface of the peripheral edge of the circuit board;
A second holding portion that is provided at the same height as the first holding portion of the lower case and supports the lower surface of the through hole portion for fastening at the center of the circuit board;
A first rib portion that protrudes downward from the lower surface of the upper case and is in contact with or close to an upper surface position that does not overlap the first holding portion of the circuit board;
A second rib portion protruding downward from the lower surface of the upper case and contacting or approaching an upper surface position overlapping the second holding portion of the circuit board;
With
The first coupling means is an engagement of the engaging part of the upper case and the engaging part of the lower case,
In the coupled state by the first coupling means, the first rib portion is in contact with the circuit board, and is held so that the circuit board is sandwiched between the first rib portion, the first holding portion, and the second holding portion. And
The second coupling means is for fastening at least the second holding part and the second rib part by fastening the upper case and the lower case,
In the coupled state by the second coupling means, the second holding portion and the second rib portion hold the circuit board so as to sandwich the circuit board, and the first rib portion is more than the coupled state by the first coupling means. It will be in a state of being strongly pressed against the circuit board,
A circuit board unit characterized by that.